From the minds of Bill Myers, Frank Peretti, Angela Hunt, and Alton Gansky, 

Invitation compiles the first four episodes of the Harbingers series, each following a different character. 

BRENDA - The street-hustling tattoo artist who sees images of the future.

THE PROFESSOR - The atheist ex-priest ruled by logic.

ANDI - The professor's brilliant but geeky assistant who sees inexplicable patterns

TANK - The naïve, big-hearted jock with a surprising connection to a healing power.

The four find out that pockets of darkness are emerging throughout the world. Whether it involves a mysterious house, the unexplainable death of animals around the world, or an otherworldly little girl, each mystery they solve brings them closer to the ultimate explanation of what's happening. What will happen if they don't solve the mysteries in time?